70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
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// Copyright (c) 2002 Max-Planck-Institute Saarbruecken (Germany).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org).
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//
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// $URL: https://github.com/CGAL/cgal/blob/v5.1/Convex_hull_2/include/CGAL/ch_function_objects_2.h $
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// $Id: ch_function_objects_2.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
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// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
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//
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//
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// Author(s) : Susan Hert
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#ifndef CGAL_CH_FUNCTION_OBJECTS_2_H
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#define CGAL_CH_FUNCTION_OBJECTS_2_H
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#include <CGAL/license/Convex_hull_2.h>
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#include <CGAL/enum.h>
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namespace CGAL {
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namespace internal {
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template <class R>
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class r_Less_dist_to_line
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{
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public:
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typedef bool result_type;
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typedef typename R::Point_2 Point;
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typedef typename R::Line_2 Line;
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r_Less_dist_to_line() : line_constructed( false )
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{ }
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bool operator()(const Point& a, const Point& b,
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const Point& c, const Point& d) const
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{
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if (!line_constructed)
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{
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line_constructed = true;
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l_ab = Line(a,b);
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}
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Comparison_result res = compare_signed_distance_to_line(l_ab, c, d);
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if ( res == SMALLER )
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{
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return true;
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}
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else if ( res == EQUAL )
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{
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return lexicographically_xy_smaller( c, d );
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}
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else
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{
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return false;
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}
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}
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private:
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mutable bool line_constructed;
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mutable Line l_ab;
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};
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} // namespace internal
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} //namespace CGAL
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#endif // CGAL_CH_FUNCTION_OBJECTS_2_H
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